Monolog example

test.php

<?php

use Monolog\Logger;
use Monolog\Handler\StreamHandler;

//create a log channel
$log = new Logger('name');
$log->pushHandler(new StreamHandler('/path/to/log', Logger::WARNING));

// add records to the log
$log->addWarning('Foo');
$log->addError('Bar');

// autoload Monolog lib
function __autoload($class) {
    $class = str_replace('\\', '/' , $class) . '.php';
    require_once($class);
}

?>